Update app.py

app.py

@@ -14,7 +14,7 @@ bnb_config = BitsAndBytesConfig(
 )
 
 model = MllamaForConditionalGeneration.from_pretrained(
-    model_name,
+    ckpt,
     quantization_config=bnb_config,
     device_map="auto"
 )